Water paint



Patented Jan. 29, 1929.

ALFRED P. GOODELL, O1

SALEM, AND GARDNER: W.

MASSACHUSETTS.

man. or ,nvannr'r,

warm; rams;

Io Drawing.

In the ordinary water paint, an adhesiy e,

when'applied thickly enough to cover the surface in a single coat, peels, laps, checks and cracks off in flakes and strips. Unless the paint body is built up, the paint istoo thin, and will not only run when applied,

but the paint film has a tendency to snap open into small pin holes or globules, which will not fillup unless the painter goes over the surface again, with resultant waste of labor and material. To offset this condition, it is usual to first apply a priming coat ,to the surface. We have discovered that a water paint of greatly improved qualities as regards opacity, flow and brushing and covering powers may be produced by mixing with the usual adhesive vehicle of the usual water paint, certain ingredients which combine therewith to im art thereto the characteristic qualities 0 the expensive oil paint Vehicle. We thus obtain a paint which com bines the advantages of the usual. water paint as regards cost with those of the usual oil paint as regards opacity and covering powers, and which, moreover, can be applied efi'ectively in a single coat, whereas the usual water and oil paints both require two applications. In our paint, the pigments are distributed uniformly throughout the mass so that their true tones are brought out when applied, instead of being covered by an over- Our paint is characterized by a lesser amount of pigment per gallon than is .required in other paints, while being, however extremel brilliant in pigmentation, and by a spr'ea 'ng and clinging capacity which causes the paint film to sink into the texture of then surface to be covered, rather than remain on the exterior as an inert film body.

With our paint, the film formation is markedly uniform, and the film has no tendency-to snap open into small pit holes,

-. lying film of oil, as with the usual oil paint.

Application filed nmh'u, 1926.. Serial in. 94,040.

or globules, which leave bare pits, or circle s, and which will not fill up unless the painter goes overthe surface a second time, with resultant waste of labor and material. Our pamt enables us to re-coat a surface wlthout washing off the original coating, and without the necessity. of re-priming the surface, as is necessary with the usual water paint. While particularly intended for use as an interior finish, it may be used for outside surfaces, and may be brushed or sprayed with equal facility.

According to our invention, we mix with the adhesive vehicle containing the pigments an agent having the dual properties of plasticizing the mass and suspending the pigments therein, and an agent having the dual properties of lubricating the mixture. thus improving its spreading power, and of flexibilizing the paint film in the drying stage thereof by equalizing the strains, thus preventin cracking and checking.

The adhesive vehicle may be anyaninial proteid, as casein, glue, or albumen, or may be sodium silicate. Where casein is used, it may be the commercially prepared product now on the market.

The igments used are characteristically the bri liant, high grade pigments usually found in oil pa1nts,-as lithopone and zinc oxide. Variations may be had by using car- Qmnate of lead, sublimed lead, blue lead, titanium oxides, iron oxides, manganese oxides, carbonblack, lamp black, umbers, ochres or siennas.

-The suspension agent may be clay, asbestine, silica or other inert matter. Clay is the preferred material, but where easier. spread and slide are desired, we may replace a portion of the cla or other agent used, with talc or materia having the properties of talc.

The lubricant may be any emulsified wax or non-drying oil, as paper-makers wax, which is a well known preparation in the paper-making trade, and consists in part of steairine and parafline, or japan wax may be use The wax blends with the casein, or other adhesive binder, retarding the hardening action thereof, and lubricating the pigment mass, allowing the strains in the paint film to equalize themselves in the drying stage, and giving a smooth, slick spread as the paint is applied. It also assists to anchor the fluid body of the paint to the spot where ,1

Although theproportions may be varied' as occasion requires, we have found that excellent results are obtained .w1th approximately the following mixture:

Binder 1 lb. Pigment 3 lbs. Suspension agent 1 lb. Lubricant 3 ounces In mixing our paint com osition, the casein is first put in solution y means of any usual solvent, as water and ammonia, by which the casein is dissolved in the presence of heat, after which the other'ingredients are mixed therewith. The preparation is now ready to be mixed with water, referably hot water, -at a temperature 0 about 150 F., although good results may be obtained where cold water is used. Ordinarily, we use aone to one ratio, that is to say, a pint of water for every ound of material. The material is gradua ly added to the waterwhile being thoroughly stirred until reduced to oil paint consistency, and is then allowed to stand for a sufiicient length of time, usually twelve hours, so as to insure thorough dissolution of the adhesive. this oint, if desired, suitable tints may be adde As will be obvious, however, we may vary the method of combining the ingredients according to the ultimate character of the products desired. For example, if a paint in paste form is wanted, we may dilute the mix with sufiicient water to form a paste before the mix is packaged, and may add the necessary additional 'water to reduce the paste to brushing consistency just before the paint is applied. 7

'Various modifications in ingredients and proportions may obviously be resorted to within the spirlt of our invention, as defined by the appended claims.

Whatwe therefore claim and desireto secure by Letters Patent is:

1. As a new composition of matter for use as a single coat paint, a mixture which when diluted with water forms a spreadable coating which may be applied to a surface to form a quick drying permanently white light reflective film of great covering and hiding power, said mixture including a casein solution, a ermanently white finely divided pigment, c ay, and a wax emulsion actingto retard the hardening action of the casein, lubricating the pigment mass, and

flexibilizin the paint film to prevent cracking and c ecking thereof in the drying stage, the proportions of said mixture by weight being approximately as follows: casein, 1 1b.; pigment, 3 lbs; clay, 1 1b.; wax emulsion, 3 oz.

2. As a new composition of matter for use as a single coat paint, a mixture including a casein solution, a permanently white finely divided pigment, clay, and a wax emulsion acting to retard the hardening action of the casein to lubricate the. igment mass and to fiexibilize the paint fi so as to prevent cracking and checking thereof in the drying stage, the proportions of said mixture being such as to produce when diluted with water a spreadable coating which may be applied to a surface to form a quick dr ing rmanently white 1i ht reflective fi m 0 great covering and hi ingpower.

3. As a new composition of matter for use as a single coat paint, a mixture'including a casein solu'tion, lithopone, clay, and paper-makers wax in such proportions as to produce when diluted with water a spreadablecoating which may be applied to a surface to form a quick drying permanently white light reflective film of great covering and hiding power.

' In testimony whereof we afiix our signatures.

ALFRED P. GOODELL. GARDNER w. TAKE. 

